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Open AccessEditor’s ChoiceArticle

Asymmetric Hysteresis Loops in Structured Ferromagnetic Nanoparticles with Hard/Soft Areas

1
Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, 33619 Bielefeld, Germany
2
Center for Science and Education, Institute of Physics, Silesian University of Technology, 44-100 Gliwice, Poland
*
Author to whom correspondence should be addressed.
Presented at the IOCN2020, online, 15–30 November 2020.
Academic Editor: Ana María Díez-Pascual
Nanomaterials 2021, 11(3), 800; https://doi.org/10.3390/nano11030800
Received: 7 March 2021 / Revised: 17 March 2021 / Accepted: 18 March 2021 / Published: 21 March 2021
Horizontally shifted and asymmetric hysteresis loops are often associated with exchange-biased samples, consisting of a ferromagnet exchange coupled with an antiferromagnet. In purely ferromagnetic samples, such effects can occur due to undetected minor loops or thermal effects. Simulations of ferromagnetic nanostructures at zero temperature with sufficiently large saturation fields should not lead to such asymmetries. Here we report on micromagnetic simulations at zero temperature, performed on sputtered nanoparticles with different structures. The small deviations of the systems due to random anisotropy orientations in the different grains can not only result in strong deviations of magnetization reversal processes and hysteresis loops, but also lead to distinctly asymmetric, horizontally shifted hysteresis loops in purely ferromagnetic nanoparticles. View Full-Text
Keywords: pseudo-exchange bias; minor loop; micromagnetic simulation; OOMMF; spintronics pseudo-exchange bias; minor loop; micromagnetic simulation; OOMMF; spintronics
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MDPI and ACS Style

Detzmeier, J.; Königer, K.; Blachowicz, T.; Ehrmann, A. Asymmetric Hysteresis Loops in Structured Ferromagnetic Nanoparticles with Hard/Soft Areas. Nanomaterials 2021, 11, 800. https://doi.org/10.3390/nano11030800

AMA Style

Detzmeier J, Königer K, Blachowicz T, Ehrmann A. Asymmetric Hysteresis Loops in Structured Ferromagnetic Nanoparticles with Hard/Soft Areas. Nanomaterials. 2021; 11(3):800. https://doi.org/10.3390/nano11030800

Chicago/Turabian Style

Detzmeier, Joscha; Königer, Kevin; Blachowicz, Tomasz; Ehrmann, Andrea. 2021. "Asymmetric Hysteresis Loops in Structured Ferromagnetic Nanoparticles with Hard/Soft Areas" Nanomaterials 11, no. 3: 800. https://doi.org/10.3390/nano11030800

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